The invention relates to the technical field of starch extraction process, in particular to a dry type cassava starch extraction process. The dry type cassava starch extraction process includes the steps: placing cassava into a polishing device for polishing; placing the polished cassava into a crushing device for crushing, wherein more than 95% of starch and less than 10% of fibers in the cassava can be crushed by the crushing device so that cassava powder is prepared; feeding the cassava powder into a screening device for separation so that cassava starch and cassava residues are obtained; performing air drying, cooling and collecting the cassava starch by a collecting device; and packaging the cassava starch into a finished product prior to warehousing. The dry type cassava starch extraction process substitutes for a traditional levigation extraction process, can achieve zero water consumption, zero gas consumption and zero discharge, and is free of any chemical preparation, low in equipment cost, labor cost and production cost and high in processing efficiency. The extracted cassava starch is an all-natural product and high in quality, and the process meets the requirements of modern society on environmental protection and is high in economic and social benefits.